Module org.apache.jena.arq

Package org.apache.jena.sparql.engine.index

Class HashIndexTable

java.lang.Object

org.apache.jena.sparql.engine.index.HashIndexTable

All Implemented Interfaces:

IndexTable

public class HashIndexTable
extends Object
implements IndexTable

Indexes bindings so that they can be search for quickly when a binding to all the variables is provided. If a binding to only some of the known variables is provided then the index still works, but will search linearly.

Constructor Summary

Constructors

Constructor	Description
HashIndexTable(Set<Var> commonVars, QueryIterator data)

Method Summary

Modifier and Type	Method	Description
boolean	containsCompatibleWithSharedDomain(Binding binding)	Is there a binding in the table that has a shared domain (variables in common) and is join-compatible?
String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

HashIndexTable

public HashIndexTable(Set<Var> commonVars,
 QueryIterator data)
               throws org.apache.jena.sparql.engine.index.HashIndexTable.MissingBindingException

Throws:

org.apache.jena.sparql.engine.index.HashIndexTable.MissingBindingException

Method Details

toString

public String toString()

Overrides:

toString in class Object

containsCompatibleWithSharedDomain

public boolean containsCompatibleWithSharedDomain(Binding binding)

Description copied from interface: IndexTable

Is there a binding in the table that has a shared domain (variables in common) and is join-compatible? This is the condition for MINUS to exclude the argument binding.

Specified by:

containsCompatibleWithSharedDomain in interface IndexTable